M-68 Dual Speaker

Lafayette Radio & TV Corp; New York (NY)

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  • Year
  • 1932/1933
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 161421
    • alternative name: Wholesale Radio

 Technical Specifications

  • Number of Tubes
  • 10
  • Main principle
  • Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 25 - 40 cycles 220 - 240 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: M-68 Dual Speaker - Lafayette Radio & TV Corp; New
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 18 x 6.5 x 9 inch / 457 x 165 x 229 mm
  • Notes
  • This family of 10 tube Dual Speaker models is shown by Rider's (drawn Sept. 27, 1935) as M-65 only, which is the chassis - and M-65 is also the only model with only one speaker. The M-66 chassis is for 220-240 volts 25-40 cycles as are M-68 chassis and console M-52. M-67 and M-68 are dual speaker chassis and M-51 and M-52 consoles. All are met by the Rider's schematic for M-65. They all feature an adjustable muting system with a tube 56, the other 56 is the oscillator. The 55 is used as diode detector only. For the M-52 and M-68 the catalog mentions 220-240 volts 25-60 cycles but we believe this is an error since the chassis is for 25-40 cycles.

    See picture details and see details and summaries for the models of this catalog no. 53 for 1933 (Season 1932/33).
  • Price in first year of sale
  • 40.00 $
  • Circuit diagram reference
  • Rider's Perpetual, Volume 10 = 1939 and before
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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